My router r7000 will stream over Dlna. My issue is getting something to stream the video without an internet connection. I loaded Kodi on a firestick this morning and it won't work without internet. It's a firestick issue without internet the only option the firestick will give you is to change network settings. I have no access to any other menu.
I use a Mac-mini in my house that runs an iTunes and Plex server but don't need that in the rv.
Kodi worked great I just need a different piece of hardware for the Kodi client.